# This file is part of cloud-init. See LICENSE file for license information.

"""Argparse argument setup and sanitization."""

import os

from tests.cloud_tests import config, util
from tests.cloud_tests import LOG, TREE_BASE

ARG_SETS = {
    'BDDEB': (
        (('--bddeb-args',),
         {'help': 'args to pass through to bddeb',
          'action': 'store', 'default': None, 'required': False}),
        (('--build-os',),
         {'help': 'OS to use as build system (default is xenial)',
          'action': 'store', 'choices': config.ENABLED_DISTROS,
          'default': 'xenial', 'required': False}),
        (('--build-platform',),
         {'help': 'platform to use for build system (default is lxd)',
          'action': 'store', 'choices': config.ENABLED_PLATFORMS,
          'default': 'lxd', 'required': False}),
        (('--cloud-init',),
         {'help': 'path to base of cloud-init tree', 'metavar': 'DIR',
          'action': 'store', 'required': False, 'default': TREE_BASE}),),
    'COLLECT': (
        (('-p', '--platform'),
         {'help': 'platform(s) to run tests on', 'metavar': 'PLATFORM',
          'action': 'append', 'choices': config.ENABLED_PLATFORMS,
          'default': []}),
        (('-n', '--os-name'),
         {'help': 'the name(s) of the OS(s) to test', 'metavar': 'NAME',
          'action': 'append', 'choices': config.ENABLED_DISTROS,
          'default': []}),
        (('-t', '--test-config'),
         {'help': 'test config file(s) to use', 'metavar': 'FILE',
          'action': 'append', 'default': []}),
        (('--feature-override',),
         {'help': 'feature flags override(s), <flagname>=<true/false>',
          'action': 'append', 'default': [], 'required': False}),),
    'CREATE': (
        (('-c', '--config'),
         {'help': 'cloud-config yaml for testcase', 'metavar': 'DATA',
          'action': 'store', 'required': False, 'default': None}),
        (('-e', '--enable'),
         {'help': 'enable testcase', 'required': False, 'default': False,
          'action': 'store_true'}),
        (('name',),
         {'help': 'testcase name, in format "<category>/<test>"',
          'action': 'store'}),
        (('-d', '--description'),
         {'help': 'description of testcase', 'required': False}),
        (('-f', '--force'),
         {'help': 'overwrite already existing test', 'required': False,
          'action': 'store_true', 'default': False}),),
    'INTERFACE': (
        (('-v', '--verbose'),
         {'help': 'verbose output', 'action': 'store_true', 'default': False}),
        (('-q', '--quiet'),
         {'help': 'quiet output', 'action': 'store_true', 'default': False}),),
    'OUTPUT': (
        (('-d', '--data-dir'),
         {'help': 'directory to store test data in',
          'action': 'store', 'metavar': 'DIR', 'required': False}),
        (('--preserve-data',),
         {'help': 'do not remove collected data after successful run',
          'action': 'store_true', 'default': False, 'required': False}),),
    'OUTPUT_DEB': (
        (('--deb',),
         {'help': 'path to write output deb to', 'metavar': 'FILE',
          'action': 'store', 'required': False,
          'default': 'cloud-init_all.deb'}),),
    'RESULT': (
        (('-r', '--result'),
         {'help': 'file to write results to',
          'action': 'store', 'metavar': 'FILE'}),),
    'SETUP': (
        (('--deb',),
         {'help': 'install deb', 'metavar': 'FILE', 'action': 'store'}),
        (('--rpm',),
         {'help': 'install rpm', 'metavar': 'FILE', 'action': 'store'}),
        (('--script',),
         {'help': 'script to set up image', 'metavar': 'DATA',
          'action': 'store'}),
        (('--repo',),
         {'help': 'repo to enable (implies -u)', 'metavar': 'NAME',
          'action': 'store'}),
        (('--ppa',),
         {'help': 'ppa to enable (implies -u)', 'metavar': 'NAME',
          'action': 'store'}),
        (('-u', '--upgrade'),
         {'help': 'upgrade or install cloud-init from repo',
          'action': 'store_true', 'default': False}),
        (('--upgrade-full',),
         {'help': 'do full system upgrade from repo (implies -u)',
          'action': 'store_true', 'default': False}),),

}

SUBCMDS = {
    'bddeb': ('build cloud-init deb from tree',
              ('BDDEB', 'OUTPUT_DEB', 'INTERFACE')),
    'collect': ('collect test data',
                ('COLLECT', 'INTERFACE', 'OUTPUT', 'RESULT', 'SETUP')),
    'create': ('create new test case', ('CREATE', 'INTERFACE')),
    'run': ('run test suite',
            ('COLLECT', 'INTERFACE', 'RESULT', 'OUTPUT', 'SETUP')),
    'tree_collect': ('collect using current working tree',
                     ('BDDEB', 'COLLECT', 'INTERFACE', 'OUTPUT', 'RESULT')),
    'tree_run': ('run using current working tree',
                 ('BDDEB', 'COLLECT', 'INTERFACE', 'OUTPUT', 'RESULT')),
    'verify': ('verify test data', ('INTERFACE', 'OUTPUT', 'RESULT')),
}


def _empty_normalizer(args):
    """Do not normalize arguments."""
    return args


def normalize_bddeb_args(args):
    """Normalize BDDEB arguments.

    @param args: parsed args
    @return_value: updated args, or None if errors encountered
    """
    # make sure cloud-init dir is accessible
    if not (args.cloud_init and os.path.isdir(args.cloud_init)):
        LOG.error('invalid cloud-init tree path')
        return None

    return args


def normalize_create_args(args):
    """Normalize CREATE arguments.

    @param args: parsed args
    @return_value: updated args, or None if errors occurred
    """
    # ensure valid name for new test
    if len(args.name.split('/')) != 2:
        LOG.error('invalid test name: %s', args.name)
        return None
    if os.path.exists(config.name_to_path(args.name)):
        msg = 'test: {} already exists'.format(args.name)
        if args.force:
            LOG.warning('%s but ignoring due to --force', msg)
        else:
            LOG.error(msg)
            return None

    # ensure test config valid if specified
    if isinstance(args.config, str) and len(args.config) == 0:
        LOG.error('test config cannot be empty if specified')
        return None

    # ensure description valid if specified
    if (isinstance(args.description, str) and
            (len(args.description) > 70 or len(args.description) == 0)):
        LOG.error('test description must be between 1 and 70 characters')
        return None

    return args


def normalize_collect_args(args):
    """Normalize COLLECT arguments.

    @param args: parsed args
    @return_value: updated args, or None if errors occurred
    """
    # platform should default to all supported
    if len(args.platform) == 0:
        args.platform = config.ENABLED_PLATFORMS
    args.platform = util.sorted_unique(args.platform)

    # os name should default to all enabled
    # if os name is provided ensure that all provided are supported
    if len(args.os_name) == 0:
        args.os_name = config.ENABLED_DISTROS
    else:
        supported = config.ENABLED_DISTROS
        invalid = [os_name for os_name in args.os_name
                   if os_name not in supported]
        if len(invalid) != 0:
            LOG.error('invalid os name(s): %s', invalid)
            return None
    args.os_name = util.sorted_unique(args.os_name)

    # test configs should default to all enabled
    # if test configs are provided, ensure that all provided are valid
    if len(args.test_config) == 0:
        args.test_config = config.list_test_configs()
    else:
        valid = []
        invalid = []
        for name in args.test_config:
            if os.path.exists(name):
                valid.append(name)
            elif os.path.exists(config.name_to_path(name)):
                valid.append(config.name_to_path(name))
            else:
                invalid.append(name)
        if len(invalid) != 0:
            LOG.error('invalid test config(s): %s', invalid)
            return None
        else:
            args.test_config = valid
    args.test_config = util.sorted_unique(args.test_config)

    # parse feature flag overrides and ensure all are valid
    if args.feature_override:
        overrides = args.feature_override
        args.feature_override = util.parse_conf_list(
            overrides, boolean=True, valid=config.list_feature_flags())
        if not args.feature_override:
            LOG.error('invalid feature flag override(s): %s', overrides)
            return None
    else:
        args.feature_override = {}

    return args


def normalize_output_args(args):
    """Normalize OUTPUT arguments.

    @param args: parsed args
    @return_value: updated args, or None if errors occurred
    """
    if args.data_dir:
        args.data_dir = os.path.abspath(args.data_dir)
        if not os.path.exists(args.data_dir):
            os.mkdir(args.data_dir)

    if not args.data_dir:
        args.data_dir = None

    # ensure clean output dir if collect
    # ensure data exists if verify
    if args.subcmd == 'collect':
        if not util.is_clean_writable_dir(args.data_dir):
            LOG.error('data_dir must be empty/new and must be writable')
            return None

    return args


def normalize_output_deb_args(args):
    """Normalize OUTPUT_DEB arguments.

    @param args: parsed args
    @return_value: updated args, or None if erros occurred
    """
    # make sure to use abspath for deb
    args.deb = os.path.abspath(args.deb)

    if not args.deb.endswith('.deb'):
        LOG.error('output filename does not end in ".deb"')
        return None

    return args


def normalize_setup_args(args):
    """Normalize SETUP arguments.

    @param args: parsed args
    @return_value: updated_args, or None if errors occurred
    """
    # ensure deb or rpm valid if specified
    for pkg in (args.deb, args.rpm):
        if pkg is not None and not os.path.exists(pkg):
            LOG.error('cannot find package: %s', pkg)
            return None

    # if repo or ppa to be enabled run upgrade
    if args.repo or args.ppa:
        args.upgrade = True

    # if ppa is specified, remove leading 'ppa:' if any
    _ppa_header = 'ppa:'
    if args.ppa and args.ppa.startswith(_ppa_header):
        args.ppa = args.ppa[len(_ppa_header):]

    return args


NORMALIZERS = {
    'BDDEB': normalize_bddeb_args,
    'COLLECT': normalize_collect_args,
    'CREATE': normalize_create_args,
    'INTERFACE': _empty_normalizer,
    'OUTPUT': normalize_output_args,
    'OUTPUT_DEB': normalize_output_deb_args,
    'RESULT': _empty_normalizer,
    'SETUP': normalize_setup_args,
}

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